Thread: mixed up main caps

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Originally Posted by 76GMC1500

They have numbers, 1-5 and arrows which should face forward. If the block hasn't been line bored, this is the way they will fit. If it has been line bored, the order and orientation may have changed.

no this should never happen. if this has been done then look for a new shop if one cap has been lost or damage then that cap should have been re stamp and line bore/ hone .not all the caps are stamp with numbers like small blocks when the engine was new .

Thanks a lot everybody, very helpful, it is a 350 small block, what i did was just try each cap on each bore and then felt with the fingernail if the cap was aligned with the bore, there is one cap where i can feel a little bit of a edge, but i have seen more blocks with the cap hangin out or in just a little bit.
Thanks

Originally Posted by nolimits10

Thanks a lot everybody, very helpful, it is a 350 small block, what i did was just try each cap on each bore and then felt with the fingernail if the cap was aligned with the bore, there is one cap where i can feel a little bit of a edge, but i have seen more blocks with the cap hangin out or in just a little bit.
Thanks

now that you think you're close, take a piece of "plasti gauge" and check it. won't take but a min. and cost very little. i would, could save you a lot of work. if you don't know how to use it , just do a search on plasti gauge on the webb.

Originally Posted by nolimits10

Thanks a lot everybody, very helpful, it is a 350 small block, what i did was just try each cap on each bore and then felt with the fingernail if the cap was aligned with the bore, there is one cap where i can feel a little bit of a edge, but i have seen more blocks with the cap hangin out or in just a little bit.
Thanks

I would also add this.
Don't use a stamp set for any rod's or cap's you will distort the rod's for sure.
Buy an etching tool instead.

Use NEW connecting rod bolts for the final assembly. Consider the torque and centrifugal forces working together at 4000 + rpm.